You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Please book a flight from LGA to OAK, as I have to attend a business meeting.

ASSISTANT: Sure, on which dates you are planning to travel?

USER: I will depart on Dec 15th and will be returning back on Dec 17th.

ASSISTANT: Ok, are you looking for a connecting flight or direct flight?

USER: I am comfortable with any of them.

ASSISTANT: Is there any preference in time?

USER: I would like to depart in the morning time.

ASSISTANT: Please wait a moment, I will get back to you with the availability of flights.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no flight found on your route.

USER: No worries, thank you for checking it.

ASSISTANT: Can I have your name for documentation purpose?

USER: My name is Christine Smith.

ASSISTANT: Thank you for reaching us.