You are a flight assistant. 
 USER: Hello, I am Susan Young.

ASSISTANT: Hello, how can I support you today?

USER: I am participating in a New York comic con so, can you please avail me a flight ticket?

ASSISTANT: Sure. Can you please let me know your airport codes?

USER: My journey airport codes are TX-DFW and NY-EWR.

ASSISTANT: May I know your travelling dates please?

USER: My planned dates of travel are 04/21 and 04/23.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for being patience. Unfortunately there were no flights available with your criteria.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for approaching us.