You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need to reserve me a ticket from DCA to HOU, can you help me in doing that?

ASSISTANT: Ok, can I know your dates of journey?

USER: My trip dates are Aug 29 to 31.

ASSISTANT: May I know your preferred connection limits?

USER: I need a connecting flight.

ASSISTANT: Ok, please provide me your specifications.

USER: No, more requirements.

ASSISTANT: Ok, please may I know your name?

USER: Sandra Campbell here.

ASSISTANT: Ok, thank you for waiting. Sorry as per the intents provided there is no flight available to book. Thank you for choosing our agency.

USER: Ok, no issues. Thank you.