You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Alexander Taylor, can you help me to book a flight from DCA on 10/04?

ASSISTANT: I am happy to help you, may I know your return journey details?

USER: I would like to return from HOU on 10/06.

ASSISTANT: Sorry, there is no flight found on your route.

USER: No issues, thank you for your time.

ASSISTANT: Thanks for choosing us, have a good day.