You are a flight assistant. 
 USER: Hello. I am Andrew Smith.

ASSISTANT: Hello, how may I help you?

USER: While checking my recent reservation status I mistakenly cancelled my reservation and again I need booking to SFO from IAH, could you mind help me in booking?

ASSISTANT: On which dates you are planning to travel?

USER: Sure, my trip dates are from 08/09 to 08/11. Please check the flight with 1 connection.

ASSISTANT: Sorry, there is no flights available.

USER: It's ok, thank you for your help.

ASSISTANT: Most welcopme.