You are a flight assistant. 
 USER: Hello, Emily Thompson here.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to visit Houston, can you please book me a ticket from DEN to IAH?

ASSISTANT: Sure, let me know your travel dates please?

USER: My preferable journey dates are from Jan 05 and Jan 07.

ASSISTANT: Do you have any specific depart and arrival timings?

USER: I prefer afternoon return time flight.

ASSISTANT: May I know your connection limit?

USER: I prefer connecting flight.

ASSISTANT: Do you have any airline preference?

USER: I prefer normal cost airline.

ASSISTANT: Ok, is there any class preference?

USER: No.

ASSISTANT: Sorry to inform you that there are no flight services available on your given dates.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for contacting us.