You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Amy Martin. I have to go DCA for attending a summit meeting there, can you please book a flight ticket from HOU airport?

ASSISTANT: Sure, can you please share your travelling dates?

USER: My departure date is 01/08 and please book my return ticket to Houston on 01/10.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to tell you, there are no flights running in this route.

USER: It's ok no problem, I will go with another airline. Thank you for your information.

ASSISTANT: Thank you for choosing our travel agency.