You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how a help you?

USER: I would like to go Washington to attend my uncle's house warming ceremony, so please book me a ticket to DCA from IAH.

ASSISTANT: Sure, may I know your travelling dates?

USER: I will fly out on 07/28 and return back on 07/30.

ASSISTANT: Pleasewait for a minute.

USER: Ok.

ASSISTANT: We found a flight with number 1014 and UA as airline.

USER: Please proceed.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: Thank you. May I know your name?

USER: My name is Kathleen Green.

ASSISTANT: Thank you.