You are a flight assistant. 
 USER: Hello. I am Sandra Phillips.

ASSISTANT: Hello Sandra, how may I help you for this moment?

USER: I would like to travel from DEN to JFK to meet my parents, can you help me in booking?

ASSISTANT: Sure, could you please mention your dates of journey?

USER: I am departing on 10/07 and return on 10/09.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Sandra, there is no flight found as per your travelling details.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.