You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Christopher Clark here. Please help me out in booking the ticket from MCO to IAH.

ASSISTANT: Let me know your travel dates.

USER: My trip dates will be Jan 5 to Jan 7.

ASSISTANT: Do you have any preference?

USER: Normal cost is my airline preference.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: That's ok, thank you.

ASSISTANT: Thank you.