You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you for a day?

USER: I am Helen Parker. Can you please book a flight ticket from SFO to LAX?

ASSISTANT: Sure, I am here to help you in booking your flight ticket Parker.

USER: Thank you.

ASSISTANT: Can you please provide your planned dates of your journey?

USER: Sure, I need to travel on dates of 05/07 and 05/09.

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

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: You are most welcome, thank you for reaching out here.