You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Donna Hernandez here.

ASSISTANT: How may I guide you today?

USER: Please help me out in booking the ticket from SFO to EWR.

ASSISTANT: Sure, I will help you with that. Can you please provide your planned dates of travelling?

USER: My trip dates will be 10/08 and 10/10.

ASSISTANT: Please wait a moment to check the flights on your route.

USER: Sure, take your time.

ASSISTANT: We regret to inform you that there are no flights moving to your region with your planned dates of travelling.

USER: That's ok, no issues.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Thank you for helping.