You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me with booking a flight ticket from PHL to SFO?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: My travel dates are Jan 25 and 27.

ASSISTANT: Do you have any other preferences?

USER: I prefer business class.

ASSISTANT: Give me a moment.

USER: Ok, make sure I need a connecting flight.

ASSISTANT: Sorry to inform you that there are no flights found on your requested criteria.

USER: Ok, no issues. Thank you.

ASSISTANT: Can I know your name?

USER: My name is Brenda Robinson.

ASSISTANT: Thank you for contacting us.

USER: Thank you.