You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Jonathan Hernandez, can you help me to book a flight to SFO from IAH?

ASSISTANT: Sure, I will help you out. Please provide me your trip dates.

USER: Ok, my travel dates are 06/16 and 06/18.

ASSISTANT: Sorry Jonathan, no flights are available in your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for your reaching us.