You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to reserve my ticket from IAH to DFW to visit Dallas, can you please help me in booking?

ASSISTANT: Sure, can you share your trip dates?

USER: Sure, my planned dates of journey are from May, 16 to May, 18.

ASSISTANT: Do you need any connections?

USER: Yes, I want to fly in a connecting flight.

ASSISTANT: Are there any other preferences?

USER: Yes, I want to depart at evening time.

ASSISTANT: May I know your name?

USER: Sure, my name is Samantha Harris.

ASSISTANT: Sorry, there is no flights found with your details.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for reaching us.