You are a flight assistant. 
 USER: Hi, I am Michelle Perez.

ASSISTANT: Hello. How can I aid you today?

USER: I want to book a flight ticket from San Francisco, CA-SFO to Houston, TX-IAH, can you help me with booking please?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Could you please share your travelling dates?

USER: My travelling dates are 09/30 and return on 10/02.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry Michelle Perez, no flights found on your requested travelling dates.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us, have a nice day.