You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I be of your help?

USER: I would like to travel from EWR to LAX, can you please help me in flight booking?

ASSISTANT: Sure, we are here to make your journey comfort.

USER: Thank you.

ASSISTANT: Please let me know if you have any class preference.

USER: I am comfortable with business class.

ASSISTANT: Kindly mention your planned travelling dates to proceed further.

USER: I want to fly on Feb 06, return on Feb 08.

ASSISTANT: Can I know your name for documentation purpose?

USER: My name is Charles Mitchell.

ASSISTANT: Do you need a whistle stop in between your journey?

USER: I am comfortable with connecting flight.

ASSISTANT: May I know if you have any other comforts in between your journey?

USER: I do not have any other requirements.

ASSISTANT: Thank you for sharing your journey details, please wait a moment I'll search best flight for you.

USER: Sure.

ASSISTANT: Thank you for being patient, we are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: Not an issue, thank you.

ASSISTANT: Thank you for approaching us.