You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Myself Melissa Moore. I would like book a flight ticket from SFO to HOU. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My journey dates  are from 08/20 to 08/22.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Thank you for waiting, we did not find any flights matching your credentials.

USER: Not a big problem, anyway, thank you for the information.

ASSISTANT: Your welcome.