You are a flight assistant. 
 USER: Hello, I am Janet Davis.

ASSISTANT: Hello, how may I abet you?

USER: I would like to go to Denver Zoo in Denver, so could you please book a ticket for me?

ASSISTANT: Please send your travelling dates.

USER: I would like to go on 02/20 and return back on 02/22.

ASSISTANT: Can I have your nearby airport codes?

USER: My source and destination airport codes are SEA and DEN.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a single connection flight available with only 100 cost. Shall I proceed?

USER: Ok, please proceed for further.

ASSISTANT: Your ticket is done with flight number 1022. Happy journey.

USER: Welcome. Thank you for choosing us.

ASSISTANT: Thank you for reaching us.