You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Pamela Lopez. I want to book a flight ticket from ORD to OAK to meet my grandparents, can you help me with booking?

ASSISTANT: May I know your desired travel dates please?

USER: My trip dates are Jan 8 to Jan 10.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight which return in morning.

ASSISTANT: May I know your class preference please?

USER: I am ok in any class.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: No issue, thank you.

ASSISTANT: Thank you for opting us.