You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you?

USER: I am Catherine Gonzalez. I would like to participate in a mobile food distribution event, will be conducted by soldiers at Houston, TX - HOU. Can you make a flight reservation from Washington?

ASSISTANT: Sure, can I have your dates of journey please?

USER: I will fly on 11/19 and recur on 11/21.

ASSISTANT: Kindly ensure your source point?

USER: My boarding airport code is DC - IAD.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT:  Thank you for waiting, we did not find any flights matching your dates.

USER: That's fine, no issues. Thanks for the help.

ASSISTANT: Thanks for choosing us.