You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Jonathan Williams.

ASSISTANT: How may I guide you today?

USER: I want to book a flight ticket from LAX to LGA. Please help me in booking a flight ticket.

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: My dates of journey are 06/12 to 06/14.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.