You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you?

USER: Please, reserve me a seat on 11/14 on my name Melissa White.

ASSISTANT: Sure, may I know your return date?

USER: I will return on 11/16.

ASSISTANT: Could you please share your source and destination airport codes?

USER: I will start from San Francisco, SFO to attend cradle function of friends son in New York, LGA.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: Ok, I will choose other airline. Thank you.

ASSISTANT: Thank you for opting us.