You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I want to reserve my ticket from SFO to PHL, can you please help me to book a ticket?

ASSISTANT: Sure, I will help you. Can I have your planned journey dates please?

USER: Ok, my planned dates of journey are from Nov, 14 to Nov, 16.

ASSISTANT: May I know your name please?

USER: Sure, my name is Donna Taylor.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a airline preference which is having normal cost.

ASSISTANT: Do you need any halt in between your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Donna Taylor, no flights has been found on your airline preferences.

USER: Ok, not an issue. Thank you for your service.

ASSISTANT: Thank you for approaching us.