You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Katherine King. I would like to book a flight ticket from OAK to CLT to meet my aunt.

ASSISTANT: Sure, please share me your travelling dates?

USER: My travelling dates are Jan 30 and Feb 1.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Sorry, there were no flights with your given dates.

USER: I want to depart in the morning. No worries, thank you for the information.

ASSISTANT: Thank you for reaching us.