You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Melissa Edwards here. I need a flight from IAH to DFW, can you please help me in booking a flight ticket?

ASSISTANT: Sure, I will help you for booking. Can you please provide me your travelling dates?

USER: My trip dates are from 10/30 till 11/01.

ASSISTANT: Ok, give me a moment.

USER: Ok, take your time.

ASSISTANT: Sorry Melissa, there is no flights found on your provided dates.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome. Thank you for choosing us.