You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Anthony Scott.

ASSISTANT: How may I guide you today?

USER: I would like to visit Detroit zoo with my friends. Can you help me in booking a ticket from IAH to DTW?

ASSISTANT: Sure, I will help you with that. May I know your journey dates?

USER: My planned trip dates are 05/14 and 05/16.

ASSISTANT: Please wait for  a minute.

USER: Ok.

ASSISTANT: I am sorry to say that there is no flight found.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for contacting us.