You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I would like to travel from LAX to PHL, can you help me to book a flight ticket?

ASSISTANT: Sure, I will help you with that. Can your please provide your preferable dates of travelling?

USER: My travel dates are May 31 and June 02.

ASSISTANT: Any class preferences do you have?

USER: Yes, I prefer economy class.

ASSISTANT: Do you have any connection limit?

USER: I prefer direct flight for this trip.

ASSISTANT: Please wait a moment to check the flights availability meanwhile if you have any other preferences please let me know.

USER: Sure, please ensure that I would like to return back in the morning time.

ASSISTANT: Unfortunately there are no flights running on your route with your required preferences.

USER: No problem, thank you for the information.

ASSISTANT: For documentation purpose, can you please provide you name?

USER: My name is Dennis Harris.

ASSISTANT: Ok, thank you for reaching us.