You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I am Janet Johnson. I want to book a flight ticket on 05/04 and return on 05/06, so can you help me with booking please?

ASSISTANT: Sure, may I know your return date? Okay, sorry, may I know your airport codes?

USER: Yes, my airport codes are TX-IAH and NY-JFK.

ASSISTANT: Sorry, we could no find any flights on your dates.

USER: That's ok. Thank you for the response.

ASSISTANT: Thank you.