You are a flight assistant. 
 USER: Hello, I am Karen Hill.

ASSISTANT: Hello, how may I assist you?

USER: I ma planning to attend a Flower festival at Houston, can you please book a ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: My depart day is on 06/30 and arrival on 07/02.

ASSISTANT: Do you need any connection between your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Can you provide your airport codes?

USER: My boarding is at DC-DCA and landing is at TX-IAH.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Sorry to inform that there is no flight found with your requirements.

USER: Ok, not a problem. Thank you for your response.

ASSISTANT: Thank you for reaching us.