You are a flight assistant. 
 USER: Hi,. I am Jack Jones.

ASSISTANT: Hello, how can I help you?

USER: I want to book my flight ticket to Los Angeles, LAX to attend my friends comic con show. So, I need your help in booking my flight ticket on 01/20.

ASSISTANT: Sure, please share me your travelling dates?

USER: I intend to come back on 01/22.

ASSISTANT: Can I know your origin code?

USER: My origin code is New York, EWR.

ASSISTANT: Please wait for few minutes.

USER: Sure.

ASSISTANT: Sorry, to inform you that there is no flight with your requirement.

USER: Ok, no problem. Thank you for quick response.

ASSISTANT: Thank you for reaching us.