You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to book a flight from PHL to LAX?

ASSISTANT: Sure, may I know you planning dates to travel?

USER: My travel dates are Dec 7th and Dec  9th.

ASSISTANT: Ok, do you have any preference in connection?

USER: I am comfortable with a connecting flight.

ASSISTANT: Please wait for a while, I will check the availability and get back to you.

USER: Sure.

ASSISTANT: I am sorry to inform you that there is no flight available on your route.

USER: No problem, thank you for checking it.

ASSISTANT: Thank you for contacting us. Can I have your name please for documentation purpose?

USER: Sure, my name is Patrick Wright.

ASSISTANT: Thank you, Patrick Wright.