You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to book a flight ticket with the name Larry Brown, can you help me to book a flight ticket?

ASSISTANT: Sure, Can you forward travelling dates?

USER: My preferable travelling dates would be on 01/03 to 01/05.

ASSISTANT: Let me know your airport codes?

USER: airport codes are EWR-SFO.

ASSISTANT: May I know your good name? Wait for a while.

USER: Ok, I already mentioned.

ASSISTANT: Thank for waiting, There is no flight found with your specified data.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for reaching us.