You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please reserve a flight ticket from DCA to HOU?

ASSISTANT: Sure, may I know your travel dates?

USER: 08/04 and 08/06 are my travelling dates.

ASSISTANT: May I know your good  name please?

USER: Ashley Harris is my name.

ASSISTANT: There is no flight on your details.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you.