You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Jacob Baker.

ASSISTANT: OK.

USER: Could you help me in booking a flight ticket from Houston to New York on 11/26?

ASSISTANT: Sure, may I know your airport codes please?

USER: My source and destination airport codes are TX - HOU, NY - EWR.

ASSISTANT: May I know your return date please?

USER: I want to return on 11/28.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, there are no flights found with your specifications.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.