You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Kevin Williams, want to travel from DTW to IAH. Please help me in booking my ticket.

ASSISTANT: Sure, on which dates you are planning to travel?

USER: My travelling dates are from 03/22 to 03/24.

ASSISTANT: Do you have any other requirements?

USER: My return time will be in the morning with 1 connecting flight.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry Kevin, there is no flights available on these dates.

USER: It's ok, thank you for your help.

ASSISTANT: Most welcome.