You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Laura Taylor. I like to travel from DCA tp PHL, can you help in booking?

ASSISTANT: Sure Laura Taylor, can I know the travel dates please?

USER: My date of journey is on 07/21 to 07/23.

ASSISTANT: Sorry Laura, there are no flights as per your request.

USER: That's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.