You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Virginia Thompson here. Please help me out in booking the ticket from SFO to PHL.

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

USER: My trip dates will be Jan 26 to Jan 28.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: Thank you for sharing the details.

USER: Ok.

ASSISTANT: There were no flights available that matches your requirements.

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing us.