You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: My name is Edwards Edwards. I have a plan to meet my father in Fort Worth. Can you help me for booking a flight ticket from IAH to DTW?

ASSISTANT: Sure, can you please share your planning dates of journey?

USER: My travelling dates are from 05/26 till 05/28.

ASSISTANT: Please wait a moment. Sorry, no flights are available on your route.

USER: Thta's ok, thank you for your information.

ASSISTANT: Welcome, have a nice day,.