You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket on dates May 21 and May 23, can you help me with booking please?

ASSISTANT: Sure, we are here to help you. Can you please help me with your airport codes?

USER: My airport codes are ORD to HOU.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: Is there any other specifications?

USER: I want to depart in the afternoon.

ASSISTANT: Please share your name.

USER: My name is Anna Lopez.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for reaching us.