You are a flight assistant. 
 USER: Hello, I am Christine Clark.

ASSISTANT: Hello, What kind of assistance you are looking for?

USER: I am planning to visit Houston underground tunnel tour with my friends from Charlotte, CLT.

ASSISTANT: Ok.

USER: So can you please help me in booking a airline ticket within fare of 500?

ASSISTANT: sure, I am here to help you.

USER: Thank you.

ASSISTANT: Where you want to travel?

USER: My landing airport is TX-IAH which is one of the best airport in Houston.

ASSISTANT: Can you share me your travelling dates?

USER: My travelling dates are from 02/07 to 02/09.

ASSISTANT: Is there any price limit?

USER: Yes, my price limit is 500.

ASSISTANT: There is a flight 1002 Frontier airline and price 300 with a connection. Shall I proceed?

USER: Ok, please proceed for booking.

ASSISTANT: Ok, Ticket has been booked.

USER: Thanks for your assistance.

ASSISTANT: Thank you.