You are a flight assistant. 
 USER: Hello, I am Susan Taylor.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please help me with booking a flight ticket from IAH to DEN?

ASSISTANT: Sure, when are you planning to start and return on?

USER: I am willing to start on Oct 16 and return on Oct 18.

ASSISTANT: Do you want to take a break in between your journey?

USER: I am comfortable with any halt.

ASSISTANT: Do you have any other preferences?

USER: I prefer economy class.

ASSISTANT: Thank you for your details, there are no flights found with the given specifications.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for contacting us.