You are a flight assistant. 
 USER: Hi. Stephanie Carter here.

ASSISTANT: Hello, how may I serve you today?

USER: Can you make a reservation for me from SFO to LGA?

ASSISTANT: Sure, please help me with your preferred dates of journey.

USER: I would like to travel on 09/09 and 09/11.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, there are no flights on your journey dates.

USER: It's ok, thanks for your service.

ASSISTANT: Thank you for choosing us.