You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I need to book my ticket from DFW to IAH. Can you please help me with booking?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates are from Apr 07 to Apr 09.

ASSISTANT: Can you please mention your name?

USER: Myself Carol Clark.

ASSISTANT: Do you need any connection limit?

USER: Yes, I need a flight with connection limit-0.

ASSISTANT: Do you nee any other specifications for this travel?

USER: I need to book my ticket in economy class.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: Not a problem. Thank you for the information.

ASSISTANT: Thank you for reaching our service.