You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ronald Lewis.

ASSISTANT: What type of help do you want from us?

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

ASSISTANT: Sure, I am here to help you. May I know your travel dates to check the flight availability?

USER: I am travelling on these dates NOV 30th and DEC 2nd.

ASSISTANT: Ok, may I know your class preference?

USER: I prefer economy class.

ASSISTANT: Ok, do you have any other preferences?

USER: I prefer normal cost airline.

ASSISTANT: Sorry to inform you that, there is no flight found in this route with the dates you have given.

USER: Ok no problem, thank you for your services.

ASSISTANT: You are welcome. Thank you for reaching us.