You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Melissa Adams here. Can you find a direct flight for me from IAH to LAX?

ASSISTANT: Ok, please mention your trip dates.

USER: My trip dates are 04/08 and 04/10.

ASSISTANT: Sorry for the inconvenience, there is no direct flight on your route to book the ticket.

USER: It's ok, anyway thanks for your service.

ASSISTANT: Ok, thanks for approaching us.