You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how could I help you?

USER: Can you please help me in booking a flight ticket from SFO to EWR?

ASSISTANT: Sure, to book a ticket may I know your journey dates please?

USER: My planned travel dates are in Jan 5th to 7th.

ASSISTANT: Is there any class preference for you?

USER: I prefer business class.

ASSISTANT: Do you have any other requirements?

USER: I need a single break in my journey.

ASSISTANT: Please provide your name.

USER: Emma Carter here.

ASSISTANT: We did not find any flight on your route according to your given dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.