You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be a help for you?

USER: I would like to visit Seattle to analyse the weather conditions in summer. Can you help me in booking a ticket?

ASSISTANT: Sure, may I know your airport codes?

USER: The journey airport codes are LGA and SEA.

ASSISTANT: Can you help me by providing your preferable dates to travel?

USER: My preferred travel dates would be 07/04 and 07/06.

ASSISTANT: We are sorry to inform you that there is no flight available on your requested dates.

USER: That's fine, I will go for other agency. Anyways, thank you for the information.

ASSISTANT: May I know your good name please?

USER: My name is Larry Jones.

ASSISTANT: You are welcome.