You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: Can you please help me to reserve a flight ticket with economy flight?

ASSISTANT: Sure, may I know airport codes please?

USER: I would like to fly from DCA to DEN.

ASSISTANT: On which dates your planning to travel?

USER: I have planned to travel on July 24th and return on July 26th.

ASSISTANT: Do you have any specifications?

USER: I don't have any specifications.

ASSISTANT: There is a double connection flight in United airlines, can I  proceed for booking in economy class?

USER: Please proceed.

ASSISTANT: On which name can I proceed for booking?

USER: Jennifer Phillips here.

ASSISTANT: Your booking is done in 1006 flight.

USER: Thank you.

ASSISTANT: Thank you for choosing us.