You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: Can you help me to book a flight ticket from DCA to HOU?

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My travel dates are Aug, 27 and Aug, 29.

ASSISTANT: On what name, do I need to reserve your ticket?

USER: Elizabeth Allen here.

ASSISTANT: Let me know your connection limit?

USER: I would prefer single connection.

ASSISTANT: Do you have any other requirements?

USER: No, thank you.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for choosing us.