You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Raymond Adams here.

ASSISTANT: How can I assist you at this moment?

USER: Me and my friend were planned a trip to Houston. The ticket is confirmed for my friend but due to some technical issues my ticket is not yet confirmed, so can you reserve a flight ticket again to me?

ASSISTANT: Sure, I will help you in booking flight ticket.

USER: Thank you.

ASSISTANT: Can you please mention your travel dates for booking flight ticket?

USER: Sure, I am planning to move on 07/21 and please book my return ticket on 07/23.

ASSISTANT: May I know your preferable airport code names for further process?

USER: Sure, I want to travel from BOS to HOU.

ASSISTANT: Please hold on a moment, I will check flight availability in this route.

USER: Ok, take your time.

ASSISTANT: Sorry for the inconvenience no flights available in this route as per your requested dates.

USER: Oh! So sad to hear that. Anyway, I will choose another alternative to go there. Thank you for the information.

ASSISTANT: Thank you for contacting us, have a good day.

USER: Welcome.