Involving the tourism service industry (travel agency), it is necessary to have the license certificate (pre-approval) of the tourism bureau to which the corresponding registration place belongs.
Then it doesn't matter if you only do travel consultation and write travel consultation. Then in brackets, industry and commerce generally write down various restrictions, such as operating with a license involving administrative license. That's probably what you have to do.
There is also tourism. You'd better apply to the department-level authorities first. Generally speaking, there are few business scope related to tourism that can be approved by the organs below the department level. Unless you are assigned by your superiors to do it below (don't tell me that you don't know the classification of civil servants in China government) and clearly tell you that the higher the level of the application examination and approval authority, the easier it is to apply.
Finally, it seems that booking a plane ticket is for you to talk to the airline, right? It's hard to say whether they are willing to accept your business scope. Besides, there are so many domestic airlines, some are loose and some are tight. I can't grasp all the internal requirements for signing a contract. Sorry)