You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is David Taylor.

ASSISTANT: How may I assist you?

USER: I am a story writer and would like to travel to Dallas to get good mood for writing stories. Can you help me in booking a ticket?

ASSISTANT: Good, may I know your source and destination airport codes?

USER: The respective airport codes are EWR and DFW.

ASSISTANT: Can I have your planned dates please?

USER: I am planning my journey on dates 12/10 and 12/12.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Taylor, no flights has been found on your details.

USER: Its ok, I will go to nearby park. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.