You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to travel from DCA to IAH as a business trip, can you do the reservation?

ASSISTANT: Sure, can you share me your trip dates?

USER: My trip dates are 03/18 and 03/20.

ASSISTANT: Is there any specifications?

USER: Departure and return time should be afternoon.

ASSISTANT: Can I have your good name?

USER: Emma Baker here.

ASSISTANT: There are no flights found on your specified travel dates.

USER: No issue, thanks for the information.

ASSISTANT: Thank you for reaching us.