You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you?

USER: I am Christopher Thomas. I want to book a flight ticket from NC-CLT to NY-JFK. Can you help me?

ASSISTANT: Sure,do you prefer either an economy or business class?

USER: I am comfortable with any class.

ASSISTANT:  Please provide me your planned travel dates to proceed.

USER: 11/19 and 11/21 are my travelling dates.

ASSISTANT: Please let me know if you have any other preferences.

USER: I need to depart in the evening.

ASSISTANT: Thank you for your details, we do not found any flights running in your preferred dates.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.