You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Shirley Wright. I have planned to visit Houston to study about green house effect. So please help me with flight ticket booking from New York.

ASSISTANT: Sure, I am gleeful to help you out. Please provide me your location airport code.

USER: Thank you. I would like to travel from EWR to HOU.

ASSISTANT: May I know your travel dates please?

USER: Sure, I have planned my travel dates as 03/28 and 03/30.

ASSISTANT: Sorry Shirley Wright, there is no flight in your route with desired travel dates.

USER: Oh! It is sad to hear. Now, I need to go with another agency to reach Houston. Anyway, thank you for your time.

ASSISTANT: Ok, Hope you reach on time in your destination. Thank you for reaching us.