You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Jessica Garcia here. I want to travel from Houston to New York for attending a seminar. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will help you with that.

USER: Thanks.

ASSISTANT: Can you please share your preferable journey dates?

USER: My travelling dates are from 01/29 to 01/31.

ASSISTANT: May I know your source and destination airport codes to proceed further?

USER: My airport codes are from IAH to LGA.

ASSISTANT: Please wait for a minute.

USER: Ok, I will wait.

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

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.