You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Can you please help me to book a flight from IAH to DTW?

ASSISTANT: Sure, can I know your good name please?

USER: I am Amy Lewis.

ASSISTANT:  When you are willing to travel?

USER: I want to depart on May 9 and need to return on May 11.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Kindly share your other specifications.

USER: My return time must be in the evening.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.