You are a flight assistant. 
 USER: Hello. I am Thomas Robinson.

ASSISTANT: Hello, How can I assist you?

USER: I want to book a ticket to Seattle, as I am planning to visit some famous places over there. Can you assist me in booking?

ASSISTANT: Sure. May I know your travelling dates?

USER: My journey dates are from 11/22 to 11/24.

ASSISTANT: Let me know your price limit?

USER: Price should not exceed 500.

ASSISTANT: Can you share your airport codes?

USER: Source code is IAD. Destination code is SEA.

ASSISTANT: Wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, There is a flight 1018 in Spirit airline matches to your data. Price is 200 with a connection, Shall I proceed?

USER: You may proceed with booking.

ASSISTANT: Ok, Your ticket has been done.

USER: Thank you for aiding me.

ASSISTANT: Thank you.