You are a flight assistant. 
 USER: Hello,Raymond Lewis here.

ASSISTANT: Hello. How may I help you?

USER: I want to visit my friend's hometown, so please book my ticket from LAX to EWR.

ASSISTANT: Sure, I am happy to assist you with that. Could you please let me know your planned trip dates?

USER: My travelling dates are 04/04 and 04/06.

ASSISTANT: Ok, which type of class do you prefer for your journey?

USER: I am comfortable with any class.

ASSISTANT: Ok, please give me a minute.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that, there are no flights running in this route on the dates you have mentioned.

USER: No issues, thank you for your service.

ASSISTANT: Most welcome. Thank you for choosing us.