You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Samuel Green.

ASSISTANT: How may I guide you today?

USER: I want to book a ticket from LGA to MSP, for attending a birthday party of my friend.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can  you please share your journey dates?

USER: Sure, my travelling dates are 11/16 and 11/18.

ASSISTANT: Wait for a minute.

USER: Sure.

ASSISTANT: I am sorry to say that there is no flight found.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for contacting us.